Wirelessly posted (iPhone 3GS: Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8A293 Safari/6531.22.7)
If you are using MM now then your contacts, calendar etc are in MM (cloud) and not on iTunes. When you get the new phone MM will just start syncing with it after setup. When I got my new phone I just connect my old to iTunes for final sync and backup. Then plugged in new phone and activated and restore my just backed up settings and pictures and music and video and MM just synced over the air.